In WebCit, imply navigate to the room into which you wish to fetch messages (usually your “Mail” room, i.e. your inbox) and select Advanced –> Edit or delete this room –> Remote retrieval, and then enter the hostname of your remote POP3 mail server, along with the username and password of your account there.

You will also notice that you can elect to keep messages on the remote server or delete them.

There is also an option to set the “interval” between collections. This setting is in seconds. If left at zero POP3 collection will occur at the system default interval. If set to a non zero value then POP3 collection for this room will occur at the configured interval. Note, however, that the system administrator can configure a low limit for this interval, if you configure an interval lower than the configured limit then this room will collect POP3 mail only at the interval limit set by the system administrator.

FreePOPs can be plugged between citadels pop3 aggregation service, and various web-email providers that don't offer pop-access. Note that you need to disable citadels pop3 (non ssl) service, so it can bind port 110.

by danboid
Some oldfashioned providers just provide one account to poll per domain. Original Recipients are provided in a special header, that needs to be restored while delivering it to citserver. Heres a sample /etc/fetchmailrc: